Reducing branch checking for non control flow instructions
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United States of America Patent
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Oct 27, 2015
Grant Date -
Jul 1, 2010
app pub date -
Aug 4, 2009
filing date -
Dec 25, 2008
priority date (Note) -
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Abstract
Some microprocessors check branch prediction information in a branch history table and/or a branch target buffer. To check for branch prediction information, a microprocessor can identify which instructions are control flow instructions and which instructions are non control flow instructions. To reduce power consumption in the branch history table and/or branch target buffer, the branch history table and/or branch target buffer can check for branch prediction information corresponding to the control flow instructions and not the non control flow instructions.
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